We will mark the PDEs which have already been assigned to the maximum number of groups and can not be chosen.

Please give three alternatives.

• Perona–Malik equation html
• Gray–Scott equations html
• Porous medium equation html
• Burgers' equation html
• Boussinesq equation html
• Biharmonic equation html
• 2D Stationary advection-diffusion html
• One-way wave equation html
• Chaplygin equation html
• Iceberg equation html
• Traffic equations html
• Cahn–Hilliard equation html
• Helmholtz equation html
• Buckley–Leverett equation html
• Shallow water equations html